代名詞と限定詞 - 人称再帰代名詞と逆代名詞

used when the subject and object of the sentence are the same, indicating that the action is done to oneself

自分

used when a person who is addressed is both the one who does an action and the one who receives the action

自分自身を

used when both the subject and object of the sentence or clause refer to a male human or animal who is being talked about

彼自身

used when a female human or animal is both the one who does an action and the one who is affected by the action

彼女自身

used when an animal or object is both the thing that does an action and the thing that the action is done to

自体

used when the speaker and one or more other people are both the ones who do an action and the ones who are affected by it

私たち自身

used when a group of people who are being addressed are both the ones who do an action and the ones that are affected by it

あなた自身

used when a group of people or animals are both the ones who do an action and the ones who are affected by it

彼ら自身

used to refer back to the subject of a sentence or clause to show that the action performed by the subject affects the subject itself

自分

used to refer to two or more people or things when they are doing something mutually or reciprocally

お互い

used to refer to the reciprocal relationship or action between multiple people or things

お互いに